Spark-arrester.



fu. A.' DONALD.

SPARK ARRESTER.

APPLICATION FILED AUG. I9. 1918.

Patente@ Apr, 29AM@ Bhn e ases i A. DONALD, 0F MDIIAN, MISSSSWPL SPARK- ESTER.

Specication of Letters Patent. Pagqgmtdl App, 2Q), 1919 Application led August 19, 1918. Serial 110.250,563.

To all whom t may concern Be it known that I, NANNIE A. DONALD, a citizen of the United States, residing at Meridian, in the county of Lauderdale and State of Mississippi, have inventednevvl and useful Improvements in Spark-Arresters, of which the following is a specification.

This invention relates to spark arresters and aims to provide a device adapted to be upon the top ora chimney or flue for the purpose of preventing the passage of sparks.I

To this end the invention includes a substantially rectangular screen formed of Woven wire and provided with side and end flanges for contact with the sides and end's of the flue, the said screen being adapted to be positioned transversely of the top of the flue, while an yadditional screen of relatively small mesh is secured thereto in a manner to provide a dome shaped chamber disposed transversely above the first mentioned screen, i. the side and end walls of the dome shaped 'chamber being extended to cover the sidesl and ends of the rst mentioned screen, while the sides of said chamber are further provided with openings havingfree hanging top flanges.

rlhe invention also consists of the following novel details of construction, combination and arrangement of parts to be herein,- after more fully described and illustrated in the accompanying drawings.

ln the drawings y Figure -1 is a perspective view of the spark arrester embodying the present invention shown in position upon a ue;

Fig. 2 is a llmngitudinal vertical sectional view thereof on the line 2 2 or Fig. 1 with the ue shown by dotted lines; and

Fig. 3 is a cross section on the line 33 of Fig. 1, the flue being omitted.

Referring t0 the drawings in detail like characters of reference denote corresponding parts throughout the several views.

As illustrated in the accompanying drawings, the invention includes a substantially rectangular screen 10` formed otwoven wire and having` its sides and ends providedwith right angularly extending side and end flanges 11 and 12 respectively.

Secured to the screen 10 in lany desired manner, is an additional screen 13 of relatively small wire mesh, this latter screen being substantially dome shaped and positidned transversely across the screen 10. rlPhe side and end Walls of the second screen are extended `over the sides and lends of the screen 10 as indicated at 14 and 15 and are secured thereto in any preferred man-ner, therebyforming a cover for the sides and ends of the screen 10. Each of the side walls of the chamber 13 are formed with oppositely disposed openings 1c, the latter being provided with outwardly extending top flanges 17 as shown. ifnthe use of the device the arrester is positioned transversely of the flue 20 over lthe sides and ends thereof in contact with the sidesv and ends of the said flue so as to close the end ci the due. The sparkscontact with the screen 10, these Sparks sufficiently small passing through the screen and "being arrested for contact with the walls of the dome shaped chamber 13. 'llhe openings 16 are for the purpose of providing an obstruction draft opening and any sparks blowing through these openings will be arrested by contact with the flanges 17.

The device may be secured in position by two angular shaped rods 18 which have their ends secured together by theraded coupling members'lQato form clamping bands around the'spark arrester and flue to clamp the former over the open end of the latter.

The invention is susceptible of various changes in its form, proportions and minor details of construction andthe right is reserved to make such changes.

Having described the invention, what is claimed is :H

1. A spark arrester embodying a screen formed of wire mesh and adapted to be placed transversely across the ilue, side and Vend flanges extending from said screen, a

second screen secured over and covering the first mentioned screen, sald second screen "being formed into a central transversely dis posed dome shaped chamber, the top wall of which is spaced 'above the irst mentioned screen and the side walls spaced inwardly from the end of said rst mentioned screen and provided with openings at their lower ends.

2. A spark arrester embodying a screen vformed of Wire mesh and adapted to be Gti placed transverselvacros's the fiile,l side and screen and the side walls spaced inwardly end anges extendingr from sind screen; a from the end of said first mentioned screen second screen secured over and covering the and provided with openings at their lower 10 4first mentioned screen, said second screen beends and outwardly extending anges prof ingformed into Ll central transversely disjecting from the top of said openings. posed dome shaped chamber, the top wall of lln-testlmony whereof I aiiix my signature.

which is spaced above the first mentioned NANNlE A. DUNALD. 

